Experence--- I added a TRE and my first pass I almost looped the bike. I believe it removes the timing retard at low RPM. I used to launch at 8K RPM, the first launch with the TRE sent me skyworld... I since changed my launch RPM to 5-6K. Prior to the TRE, this would have bogged the motor.
I noticed a big difference just reving the motor. From 5-8K it revs a whole lot faster.